An observational study in Ischemia and Non-obstructive Coronary Arteries, sponsored by NYU Langone Health. Not yet recruiting at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-05-14.
Sponsored by NYU Langone Health · Observational
The purpose of this study is to evaluate coronary artery and peripheral vein vascular endothelial profiles in patients with ischemia with non-obstructive coronary arteries (INOCA) who undergo coronary function testing (CFT). The aims are: (1) Evaluate coronary artery endothelial profiles and associations with coronary microvascular dysfunction (CMD) in INOCA. (2) Assess brachial vein endothelial cell profiles in patients with INOCA and associations with CMD, and (3) Characterize relationships between endothelial signatures and anginal symptoms, functional status, and physical activity at baseline and 1-year follow-up.
545 studies on the registry are indexed under Ischemia; 72 are open to participants now.
This study's planned enrollment of 250 is above the median of 176 across 166 observational studies indexed under Ischemia.
Browse Ischemia studies →NYU Langone Health is the lead sponsor of 1,430 studies on the registry; 258 are open to participants now.
Of its 235 completed or terminated interventional studies of FDA-regulated products, 197 (84%) have results posted.
Counted across the registry records on this site, refreshed daily.
Adult men and women age ≥18 with suspected INOCA who are planned to undergo clinically indicated coronary function testing.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Clinical (Pre-Cath) Exclusion criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
Hemoglobin (Hb)
The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
NYHA class (heart failure)
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants with ischemia with non-obstructive coronary arteries (INOCA) and endothelial sampling will be fully eligible for long-term follow up. A Wearable activity monitoring device (Fitbit) will be provided post-procedure to these participants. Participants will be followed for a minimum of 1 year.
Procedure: Invasive coronary angiography · Procedure: Coronary Artery Endothelial Cell Sampling · Device: Fitbit · Diagnostic Test: Invasive coronary function testing
Participants with obstructive coronary artery disease (CAD) at the time of angiography may undergo endothelial sampling and blood collection but will not be provided a wearable activity monitoring device or undergo long-term follow up.
Procedure: Invasive coronary angiography · Procedure: Coronary Artery Endothelial Cell Sampling
Participant will undergo invasive coronary angiography as clinically indicated (standard of care).
Endothelial cells will be obtained from clinical coronary guidewires after retrieval from the guide catheter.
Wearable activity monitoring device that measures physical activity based on the number of steps per day. The device also tracks sleep efficiency (exploratory) through a proprietary algorithm, and other health metrics. Daily step count and heart rate are recorded on the wearable device.
Participants will undergo invasive coronary function testing as clinically indicated (standard of care).
Change in Seattle Angina Questionnaire (SAQ) score
The Seattle Angina Questionnaire (SAQ) scores range from 0 to 100 for all five domains (Physical Limitations, Angina Stability, Angina Frequency, Treatment Satisfaction, and Quality of Life), with higher scores indicating better health status, fewer limitations, and less frequent angina. A 10-point change in score is typically considered clinically significant.
Time frame: Baseline, 1 year follow up
Change in Duke Activity Status Index (DASI) score
The DASI is a 12-item self-report questionnaire used to assess a patient's functional capacity. Scores range from 0 to 58.2, with higher scores indicating better functional capacity.
Time frame: Baseline, 1 year follow up
Plan to share: Yes — The de-identified participant data from the final research dataset will be shared upon reasonable request beginning 9 to 36 months after publication or as required by a condition of awards or supporting agreements, provided the requesting investigator executes a data use agreement with NYU Langone Health. This instance of data sharing will also require separate IRB review as well as review from NYU Langone's Data Sharing Strategy Board (DSSB). Requests should be directed to nathaniel.smilowitz@nyulangone.org. To gain access, data requestors will need to sign a data access agreement.
Supporting information: Study protocol, Statistical analysis plan
Time frame: Beginning 9 months and ending 36 months following article publication or as required by a condition of awards and agreements supporting the research.
Access criteria: The investigator who proposed to use the data will be granted access upon reasonable request. Requests should be directed to nathaniel.smilowitz@nyulangone.org. To gain access, data requestors will need to sign a data access agreement. This instance of data sharing will also require separate IRB review as well as review from NYU Langone's DSSB. Study data will also be submitted to publicly available databases. NHLBI BioData Catalyst (BDC) will provide long-term access to de-identified dataset(s). RNA sequencing data will be deposited into the NCBI Gene Expression Omnibus (GEO) database, a public functional genomics data repository. Data will be made available at the time of associated publication, as per NIH policy.
Data sharing details ↗ · biodatacatalyst.nhlbi.nih.gov
No publications or documents are linked to this record.
This study is not yet recruiting, as verified in May 2026. You cannot join it, but the record below documents what was studied.
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